java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-04 21:37:30,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-04 21:37:30,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-04 21:37:31,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-04 21:37:31,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-04 21:37:31,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-04 21:37:31,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-04 21:37:31,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-04 21:37:31,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-04 21:37:31,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-04 21:37:31,024 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-04 21:37:31,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-04 21:37:31,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-04 21:37:31,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-04 21:37:31,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-04 21:37:31,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-04 21:37:31,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-04 21:37:31,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-04 21:37:31,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-04 21:37:31,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-04 21:37:31,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-04 21:37:31,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-04 21:37:31,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-04 21:37:31,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-04 21:37:31,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-04 21:37:31,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-04 21:37:31,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-04 21:37:31,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-04 21:37:31,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-04 21:37:31,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-04 21:37:31,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-04 21:37:31,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-04 21:37:31,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-04 21:37:31,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-04 21:37:31,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-04 21:37:31,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-04 21:37:31,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-04 21:37:31,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-04 21:37:31,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-04 21:37:31,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-04 21:37:31,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-04 21:37:31,096 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-04 21:37:31,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-04 21:37:31,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-04 21:37:31,114 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-04 21:37:31,114 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-04 21:37:31,115 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl [2019-08-04 21:37:31,115 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl' [2019-08-04 21:37:31,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-04 21:37:31,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-04 21:37:31,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-04 21:37:31,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-04 21:37:31,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-04 21:37:31,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-04 21:37:31,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-04 21:37:31,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-04 21:37:31,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-04 21:37:31,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... [2019-08-04 21:37:31,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-04 21:37:31,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-04 21:37:31,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-04 21:37:31,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-04 21:37:31,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-04 21:37:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-04 21:37:31,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-04 21:37:32,750 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-04 21:37:32,751 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-04 21:37:32,752 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:32 BoogieIcfgContainer [2019-08-04 21:37:32,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-04 21:37:32,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-04 21:37:32,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-04 21:37:32,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-04 21:37:32,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:31" (1/2) ... [2019-08-04 21:37:32,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efda130 and model type pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:37:32, skipping insertion in model container [2019-08-04 21:37:32,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:32" (2/2) ... [2019-08-04 21:37:32,762 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl [2019-08-04 21:37:32,774 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-04 21:37:32,783 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-04 21:37:32,803 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-04 21:37:32,833 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-04 21:37:32,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-04 21:37:32,834 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-04 21:37:32,835 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-04 21:37:32,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-04 21:37:32,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-04 21:37:32,836 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-04 21:37:32,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-04 21:37:32,836 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-04 21:37:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-04 21:37:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-04 21:37:32,866 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:32,867 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-04 21:37:32,869 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1011999, now seen corresponding path program 1 times [2019-08-04 21:37:32,941 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:33,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-04 21:37:33,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:33,216 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,217 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,238 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:33,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-04 21:37:33,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-04 21:37:33,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:37:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:37:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:37:33,365 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-08-04 21:37:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:33,486 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-04 21:37:33,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:37:33,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-04 21:37:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:33,501 INFO L225 Difference]: With dead ends: 8 [2019-08-04 21:37:33,501 INFO L226 Difference]: Without dead ends: 8 [2019-08-04 21:37:33,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:37:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-04 21:37:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-08-04 21:37:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-04 21:37:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-04 21:37:33,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-04 21:37:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:33,546 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-04 21:37:33,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:37:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-04 21:37:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-04 21:37:33,547 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:33,547 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-04 21:37:33,547 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash 972615673, now seen corresponding path program 1 times [2019-08-04 21:37:33,552 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:33,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2019-08-04 21:37:33,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:33,784 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,818 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,059 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2019-08-04 21:37:34,104 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:34,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:34,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:37:34,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:37:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:37:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:37:34,165 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-04 21:37:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:34,321 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-04 21:37:34,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-04 21:37:34,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-04 21:37:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:34,323 INFO L225 Difference]: With dead ends: 10 [2019-08-04 21:37:34,323 INFO L226 Difference]: Without dead ends: 10 [2019-08-04 21:37:34,325 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:37:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-04 21:37:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-08-04 21:37:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-04 21:37:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-04 21:37:34,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-04 21:37:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:34,328 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-04 21:37:34,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:37:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-04 21:37:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-04 21:37:34,329 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:34,330 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-08-04 21:37:34,330 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1619124141, now seen corresponding path program 2 times [2019-08-04 21:37:34,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:34,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-08-04 21:37:34,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:34,545 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,650 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:34,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:34,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:37:34,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:37:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:37:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:37:34,687 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-08-04 21:37:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:34,860 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-08-04 21:37:34,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-04 21:37:34,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-08-04 21:37:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:34,861 INFO L225 Difference]: With dead ends: 12 [2019-08-04 21:37:34,862 INFO L226 Difference]: Without dead ends: 12 [2019-08-04 21:37:34,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:37:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-08-04 21:37:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-08-04 21:37:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-04 21:37:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-08-04 21:37:34,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-08-04 21:37:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:34,865 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-08-04 21:37:34,865 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:37:34,865 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-08-04 21:37:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-04 21:37:34,866 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:34,866 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2019-08-04 21:37:34,866 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1200053715, now seen corresponding path program 3 times [2019-08-04 21:37:34,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:34,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2019-08-04 21:37:34,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:35,102 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,129 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,353 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2019-08-04 21:37:35,525 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:35,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:35,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-08-04 21:37:35,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-08-04 21:37:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-08-04 21:37:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:37:35,576 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2019-08-04 21:37:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:35,722 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-08-04 21:37:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-04 21:37:35,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-08-04 21:37:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:35,723 INFO L225 Difference]: With dead ends: 14 [2019-08-04 21:37:35,723 INFO L226 Difference]: Without dead ends: 14 [2019-08-04 21:37:35,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-08-04 21:37:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-08-04 21:37:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-08-04 21:37:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-04 21:37:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-08-04 21:37:35,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-08-04 21:37:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:35,727 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-08-04 21:37:35,727 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-08-04 21:37:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-08-04 21:37:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-04 21:37:35,728 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:35,728 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2019-08-04 21:37:35,728 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2094667143, now seen corresponding path program 4 times [2019-08-04 21:37:35,730 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:35,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2019-08-04 21:37:35,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:36,058 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-08-04 21:37:36,069 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:36,091 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:36,379 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-08-04 21:37:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-08-04 21:37:36,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:36,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:37:36,416 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:37:36,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:37:36,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:37:36,417 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2019-08-04 21:37:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:36,459 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2019-08-04 21:37:36,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:37:36,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-08-04 21:37:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:36,460 INFO L225 Difference]: With dead ends: 4 [2019-08-04 21:37:36,460 INFO L226 Difference]: Without dead ends: 0 [2019-08-04 21:37:36,461 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:37:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-04 21:37:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-04 21:37:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-04 21:37:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-04 21:37:36,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-08-04 21:37:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:36,462 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-04 21:37:36,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:37:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-04 21:37:36,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-04 21:37:36,467 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:37:36 BoogieIcfgContainer [2019-08-04 21:37:36,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-04 21:37:36,470 INFO L168 Benchmark]: Toolchain (without parser) took 5293.56 ms. Allocated memory was 133.7 MB in the beginning and 196.6 MB in the end (delta: 62.9 MB). Free memory was 108.8 MB in the beginning and 80.2 MB in the end (delta: 28.7 MB). Peak memory consumption was 91.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,471 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 111.3 MB in the beginning and 111.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.31 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,473 INFO L168 Benchmark]: Boogie Preprocessor took 58.26 ms. Allocated memory is still 133.7 MB. Free memory was 107.1 MB in the beginning and 105.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,474 INFO L168 Benchmark]: RCFGBuilder took 1460.54 ms. Allocated memory was 133.7 MB in the beginning and 170.4 MB in the end (delta: 36.7 MB). Free memory was 105.1 MB in the beginning and 130.6 MB in the end (delta: -25.5 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,475 INFO L168 Benchmark]: TraceAbstraction took 3713.90 ms. Allocated memory was 170.4 MB in the beginning and 196.6 MB in the end (delta: 26.2 MB). Free memory was 130.6 MB in the beginning and 80.2 MB in the end (delta: 50.5 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2019-08-04 21:37:36,480 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 111.3 MB in the beginning and 111.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.31 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.26 ms. Allocated memory is still 133.7 MB. Free memory was 107.1 MB in the beginning and 105.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1460.54 ms. Allocated memory was 133.7 MB in the beginning and 170.4 MB in the end (delta: 36.7 MB). Free memory was 105.1 MB in the beginning and 130.6 MB in the end (delta: -25.5 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3713.90 ms. Allocated memory was 170.4 MB in the beginning and 196.6 MB in the end (delta: 26.2 MB). Free memory was 130.6 MB in the beginning and 80.2 MB in the end (delta: 50.5 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 545]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 3.6s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 15 SDtfs, 12 SDslu, 29 SDs, 0 SdLazy, 79 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 2 QuantifiedInterpolants, 3106 SizeOfPredicates, 108 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 19/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...